Portion of a shoe sole



FIG. 1 is a top, right side perspective view of a portion of a shoe sole showing my new design;

FIG. 2 is an enlarged side plan view of the portion of a shoe sole of FIG. 1;

FIG. 3 is a side plan view the portion of a shoe sole of FIG. 1; and,

FIG. 4 is an enlarged rear plan view the portion of a shoe sole of FIG. 1.

The dashed broken lines in the drawings show unclaimed environment and are for illustrative purposes only, forming no part of the claimed design. The dot-dash broken lines define the bounds of the claim and form no part thereof. 

The ornamental design for a portion of a shoe sole, as shown and described. 